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rusEFI needs K-line firmware support #3248 

only:hellen-honda-k
This commit is contained in:
Andrey 2023-03-10 15:56:08 -05:00
parent 5e826e34a2
commit f0279177d3
1 changed files with 21 additions and 7 deletions
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28
firmware/hw_layer/kline.cpp
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@ -13,18 +13,32 @@ static int kLineOut;
void kLineThread(void*) {
while (1) {
/**
* under the hood there is SERIAL_BUFFERS_SIZE which we hope to help us
*/
uint8_t bufferIn[16];
int count = chnReadTimeout(klDriver, bufferIn, sizeof(bufferIn), KLINE_READ_TIMEOUT);
int totalBytes = 0;
// a bit of a busy read open question if this would affect performance?
// on 2003 Honda for instance the bus seems to be 70%-ish busy. 9600 baud is 1.04ms per byte, a bit below 1kHz
while (totalBytes < sizeof(bufferIn)) {
int readThisTime = chnReadTimeout(klDriver, bufferIn + totalBytes, sizeof(bufferIn) - totalBytes, KLINE_READ_TIMEOUT);
if (readThisTime == 0) {
// looks like idle gap
break;
}
totalBytes += readThisTime;
}
// to begin with just write byte to console
if (count > 0) {
efiPrintf("kline: got count 0x%02x", count);
for (int i =0;i<count;i++) {
if (totalBytes > 0) {
efiPrintf("kline: got count 0x%02x", totalBytes);
for (int i =0;i<totalBytes;i++) {
efiPrintf("kline: got 0x%02x", bufferIn[i]);
totalBytes++;
}
if (count > 1) {
int crc = crc_hondak_calc(bufferIn, count - 1);
if (crc == bufferIn[count - 1]) {
if (totalBytes > 1) {
int crc = crc_hondak_calc(bufferIn, totalBytes - 1);
if (crc == bufferIn[totalBytes - 1]) {
efiPrintf("happy CRC 0x%02x", crc);
}
}